EP2871300A1 - Échelle pliante automatique - Google Patents
Échelle pliante automatique Download PDFInfo
- Publication number
- EP2871300A1 EP2871300A1 EP20130191834 EP13191834A EP2871300A1 EP 2871300 A1 EP2871300 A1 EP 2871300A1 EP 20130191834 EP20130191834 EP 20130191834 EP 13191834 A EP13191834 A EP 13191834A EP 2871300 A1 EP2871300 A1 EP 2871300A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ladder
- drive mechanism
- foldable ladder
- cover
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 51
- 230000007704 transition Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
- E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
- E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/04—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible
- E04F11/06—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic
- E04F11/062—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding
- E04F11/064—Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible collapsible, e.g. folding, telescopic folding with stringers overlapping when folded
Definitions
- the present invention relates to a foldable ladder device.
- a foldable ladder device which may be folded or unfolded without requiring manual effort.
- EP 1 035 268 provides a foldable solution, wherein a ladder arrangement may be folded when not in use and unfolded to allow access to the upper area.
- EP 1 035 268 relies on a complex arrangement of bars and folding elements to achieve its folding function.
- Further solutions known in the art provide for a foldable action, however a manual interaction with the device is required to move the device from folded to an unfolded configuration.
- the present invention comprises a foldable ladder for providing access to an opening comprising: a first motorised drive mechanism for moving a cover for the opening between a closed position and an open position; a second motorised drive mechanism coupled to a plurality of foldable ladder portions for moving the ladder portions between a folded configuration and unfolded configuration; such that, in moving the cover between the closed and the open position, the first motorised drive mechanism triggers the second motorised drive mechanism to move the ladder portions between the folded configuration and the unfolded configuration.
- This provides the advantage of a fully automated device which can move from a folded configuration, in which an opening is sealed, to an unfolded configuration in which access to the opening is provided.
- the dual drive mechanism arrangement provides for a smooth transition between folded and unfolded states and overcomes the need for excessive bracketing and cabling to transition between the states.
- the invention provides that no manual interaction with the ladder is required on the part of a user to transition between the states, unlike other solutions in which the cover must be manually opened or the ladder manually extracted.
- the second motorised drive mechanism may trigger the first motorised drive mechanism to move the cover between an open position and a closed position. This provides for a smooth transition between unfolded and folded states and further provides that no manual interaction with the ladder is required on the part of a user to transition between the states.
- the first and second drive mechanisms may comprise electrical actuators. This provides for reliable automation of the first and second drive mechanisms.
- the second drive mechanism may be positioned to the cover. This allows the second drive mechanism to unfold the ladder once triggered by the motion of the first drive mechanism and resultant opening of the cover. This further provides for a compact design which occupies space on the opening cover rather than occupying space within the upper area to which access is provided by the ladder.
- the second drive mechanism may drive a gear arrangement.
- the gear arrangement may comprise a rack and pinion arrangement. This allows for a very smooth motion between folded and unfolded states to be achieved. It allows for control and adjustment of the motion of the ladder, if required, to suit the particular location in which the ladder is to be fitted and the space into which it is to extend.
- the plurality of foldable ladder portions may comprise a first portion fixed to the cover; a second portion hingedly connected to the first portion; a third portion hingedly connected to the second portion. Hinging the second portion to the first portion allows the motorised motion of the first portion to control the second portion. Likewise, hinging the third portion to the second portion allows the motion of the second portion to control the third portion.
- the first, second and third portions may rest atop each other. This further provides for a compact design which minimises the space occupied by the folded ladder in the upper area to which access is provided by the ladder.
- the first, second and third portions may abut each other. This has the advantage of providing a continuous set of rungs to allow for ease of access to the opening.
- the third portion may further comprise an extendible end piece. This allows the third portion to be adjusted to fit a range of floor to ceiling heights when the ladder is in an unfolded configuration.
- the extendible end piece may comprise a wheel.
- the wheel provides the advantage of preventing scraping or dragging on a floor surface when the ladder is moved between configurations.
- the first and second drive mechanisms may be activatable by remote control. This allows the ladder to be fully automated and requiring no manual intervention by a user, save for pushing of a button on a remote control device to move the ladder between a folded and unfolded configuration and vice versa.
- the first and second drive mechanisms may comprise a secondary power source in case of failure of a primary power source. As such, in case of power failure, the ladder may still be operated.
- Figure 1 shows the ladder of the present invention in the closed or folded configuration
- Figure 2 shows the ladder of the present invention in a partially unfolded configuration
- Figure 3 shows the ladder of the present invention in an open or unfolded configuration
- Figure 4 shows an exploded view of the rack and pinion mechanism of the device
- Figure 5 shows a further embodiment of the rack and pinion mechanism of the device
- Figure 1 shows the ladder 1 in a folded configuration.
- the ladder comprises a first portion 2, a second portion 3 and a third portion 4 which rest atop each other.
- the first portion is further fixed to a cover 5 such as a door.
- the cover 5 serves to seal the opening to which the ladder 1 provides access, when the ladder is in the folded configuration.
- Further components of the ladder can be seen in Figure 2 in which the ladder is in a partially unfolded configuration.
- a first drive mechanism 6 is coupled to the first portion 2 of the ladder by a pair of arm elements 7, 7'.
- the arm elements may be foldable along their length into upper pieces 8, 8' which are pivotably connected to the drive mechanism 6 and lower pieces 9, 9' which are pivotably connected to the cover 5.
- the lower pieces may also be pivotably connected to the first portion 2 of the ladder 1.
- the first drive mechanism comprises a pair (20,21) of electrical actuators.
- a second drive mechanism 10 is attached to the cover 5 and to the first portion 2 of the ladder 1.
- the second drive mechanism comprises a pair (27,28) of electrical actuators ( Figure 3 ).
- the second drive mechanism drives a gear arrangement 11 which controls the separation of the second portion 3 of the ladder from atop the first portion 2 of the ladder when the ladder is moved from the folded to the unfolded configuration.
- the second drive mechanism drives the gear arrangement 11 to control the movement of the second portion 3 of the ladder to atop the first portion 2 of the ladder when the ladder is moved from the unfolded to the folded configuration.
- the gear arrangement is a rack 22 and pinion 23 type arrangement.
- the second portion 3 is coupled to the first portion by means of a hinge 12.
- the third portion 4 is coupled to the second portion by means of a hinge 12'.
- the third portion 4 is further coupled to the first portion 2 by means of a cable 13.
- a guidepiece 14 for the cable 13 is provided on the second portion 3 so that when moving between the folded and unfolded configurations, the movement of the cable 13 may be controlled.
- the third portion further comprises an end piece 30.
- the end piece comprises a wheel 15 which prevents scraping or dragging on a floor surface when the ladder is moved between configurations.
- the end piece may be extendible such that the third portion 4 can be adjusted to fit a range of floor to ceiling heights when in an unfolded configuration.
- Figure 3 shows the ladder 1 in a fully unfolded configuration.
- the lower end 16 of first portion 2 abuts the upper end 16' of the second portion 3, the lower end 17 of the second portion abuts the upper end 17' of the third portion 4.
- a continuous set of rungs 18 is provided to allow a user access the opening 19.
- FIG 4 shows an exploded view of the rack 22 and pinion 23 mechanism of the device.
- a pinion piece 23 is fixed to a pinion bracket 31 which is positioned on the lower end of each side of the first portion 2.
- the pinion 23 consists of a circular piece 32 with a toothed circumference 33.
- the pinion 23 rotates around a central axis point 34.
- the pinion bracket 31 is integrated into the hinge 12 which couples the second portion 3 to the first portion 2.
- a rack is positioned on each side of the lower end of the first portion 2 and is held to the first portion by means of a bracket 29.
- Each rack 22 consists of a toothed track 35 which is dimensioned to engage with the toothed circumference 33 of the pinion.
- Each rack 22 is fixed to an arm 37 of the each of the actuators (27,28).
- the arm 37 is moveable in an out of a sleeve piece 38, such that when the actuator extends, the arm 37 extends from the sleeve piece and when the actuator retracts, the arm 37 is drawn into the sleeve piece 38.
- the rack 22 and pinion 23 are positioned such that when the arm 37 of the actuator extends or retracts, the pinion 23 rotates over the toothed track of the rack 22.
- the rack and pinion may be made from plastic or a similar durable material.
- the bracket 29 may be made from plastic or aluminium while the ladder portions may be made from wood, plastic or aluminium.
- the bracket 29 and hinge 12 may be fixed to the ladder portions by fastening means 41, for example by nails or by screws.
- the ladder 1 of the invention will now be described in use. With the ladder 1 in its folded configuration, the cover 5 is closed.
- the pair of actuators 20, 21 of the first drive mechanism are in a fully extended position.
- the actuators 20, 21 may be activated by means of a remote control. When activated, the actuators retract to allow the arm elements 7, 7' to drop the cover 5 to an open position.
- the actuators may pull a cable, drive a lever or drive a gear arrangement in order to drop the cover 5 to an open position.
- the upper pieces 8, 8' of the arms are attached to a fixed frame 24 surrounding the opening 19 and are operated by the actuators. There is a joint 25 in the upper pieces 8,8' coupled to a bracket 26 on the fixed frame 24.
- Adjustment of the position of the bracket 26 on the frame 24 ensures that the actuators (20,21) can fully close the cover 5 when the ladder 1 is in the folded configuration.
- the lower pieces 9, 9' of the arm elements 7, 7' are attached to the cover 5.
- the upper and lower pieces are joined by a nut and bolt to create an elbow type joint.
- the actuators 27, 28 of the second drive mechanism are activated by a switch mounted on the actuators 20, 21 of the first drive mechanism.
- the second drive mechanism is triggered when the actuators 20, 21 of the first drive mechanism have almost fully retracted.
- the actuators 27, 28 of the second drive mechanism are in a fully extended position when the ladder 1 is in the folded configuration and the cover 5 is closed.
- the actuators 27, 28 retract.
- the actuator arm 37 is thus drawn into the sleeve piece 38 which has the effect of pulling the rack 22 beneath the pinion 23.
- the pinion 23 rotates upon the rack surface and as it does so, the second ladder portion 3 is unfolded from the first portion 2.
- the actuators 27, 28 are each joined to a rack 22 which slides within a channel 39 on the base of the bracket 29.
- the pinion 23 is mounted on the side of the hinge 12. As the rack 22 is engaged with the pinion 23 it unfolds the second portion 3 of the ladder 1. As the second portion 3 unfolds, the third portion 4 begins to unfold under the force of gravity and its movement is controlled by the cable 13.
- the cable 13 is attached from the hinge 12' at the upper end of the third portion through the guidepiece 14 on the second portion 3 to the bracket 29 on the first portion 2.
- the cable 13 it is attached to a spring or elastic means on the first portion 2. This arrangement keeps the cable 13 taut when the ladder 1 is in the folded configuration.
- the ladder 1 When the actuators 27, 28 are fully retracted, the ladder 1 is in the unfolded configuration and access to the opening 19 is provided.
- the end piece 30 of the third portion may be extended such that the third portion 4 can be adjusted to fit a range of floor to ceiling heights when in an unfolded configuration. An adjustment of plus or minus 100 mm (4 inches) may be provided on a given ceiling height.
- Closing the stairs is again triggered by the remote control.
- the actuators 27, 28 start to extend and thus the arm 37 extends from the sleeve piece 38, which has the effect of pushing the rack 22 beneath the pinion 23.
- the pinion 23 rotates upon the rack surface and as it does so, the second ladder portion 3 is folded up towards the first portion 2.
- the cable 13 further controls the closing of the third portion 4.
- the third portion 4 is drawn towards its folded position atop the second portion 3.
- the motion of the actuators 27, 28 of the second drive mechanism activates a switch which triggers the actuators 20, 21 of the first drive mechanism.
- the actuators 20, 21 of the first drive mechanism act on the arm elements 7, 7' to close the cover 5 and move the ladder 1 to its folded configuration.
- the ladder is fully automated, in that with the touch of a button the cover 5 opens and the ladder 1 unfolds to the floor. No manual intervention by a user is required to either open the cover or move and adjust the ladder mechanism.
- the actuators 20, 21, 27, 28 are mains powered. They further comprise a built in battery backup. As such, in case of power failure, the ladder may still be operated for a limited amount of times. When power is restored, the battery goes into a charging mode.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13191834.4A EP2871300B1 (fr) | 2013-11-06 | 2013-11-06 | Échelle pliante automatique |
US14/533,710 US9447637B2 (en) | 2013-11-06 | 2014-11-05 | Automatic foldable ladder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13191834.4A EP2871300B1 (fr) | 2013-11-06 | 2013-11-06 | Échelle pliante automatique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2871300A1 true EP2871300A1 (fr) | 2015-05-13 |
EP2871300B1 EP2871300B1 (fr) | 2019-06-12 |
Family
ID=49554050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13191834.4A Active EP2871300B1 (fr) | 2013-11-06 | 2013-11-06 | Échelle pliante automatique |
Country Status (2)
Country | Link |
---|---|
US (1) | US9447637B2 (fr) |
EP (1) | EP2871300B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130092474A1 (en) * | 2011-10-12 | 2013-04-18 | Michael William Magnussen | Ladder assembly for equipment |
CN112572498B (zh) * | 2019-09-29 | 2022-12-09 | 比亚迪股份有限公司 | 逃生梯、轨道车辆及轨道交通*** |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB311390A (en) | 1928-05-12 | 1929-10-24 | Frank Edward Bessler | Improvements in or relating to stairways |
GB333595A (en) * | 1929-01-19 | 1930-08-18 | Bessler Disappearing Stairway | Improvements in or relating to stairways |
DE3318400A1 (de) * | 1983-05-20 | 1984-11-22 | Heinz 4054 Nettetal Schatten | Zwei stockwerke eines gebaeudes verbindende, zusammenschiebbare treppe |
EP1035268A2 (fr) | 1999-03-11 | 2000-09-13 | Ming Dr. Gao | Escalier à moteur |
US6886661B1 (en) * | 2003-09-26 | 2005-05-03 | William D. Battenberg | Motorized access ladder for elevated areas |
WO2006122970A1 (fr) * | 2005-05-18 | 2006-11-23 | Michael Burke | Ensemble escalier de grenier escamotable |
US20090166129A1 (en) | 2007-12-26 | 2009-07-02 | Ernest Ray Siler | Power retractable stairway |
US20120199417A1 (en) * | 2011-02-04 | 2012-08-09 | Precision Ladders, Llc | Remote Controlled Overhead Ladder System |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6986485B2 (en) * | 2004-03-22 | 2006-01-17 | The Boeing Company | Overhead space access stowable staircase |
EP2108761A3 (fr) * | 2008-04-09 | 2012-08-01 | Michael Burke | Ensemble d'escalier de comble pliable |
CA2661101C (fr) * | 2009-04-03 | 2010-02-23 | A.H. Vanderburgh | Ascenseur d'escalier |
-
2013
- 2013-11-06 EP EP13191834.4A patent/EP2871300B1/fr active Active
-
2014
- 2014-11-05 US US14/533,710 patent/US9447637B2/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB311390A (en) | 1928-05-12 | 1929-10-24 | Frank Edward Bessler | Improvements in or relating to stairways |
GB333595A (en) * | 1929-01-19 | 1930-08-18 | Bessler Disappearing Stairway | Improvements in or relating to stairways |
DE3318400A1 (de) * | 1983-05-20 | 1984-11-22 | Heinz 4054 Nettetal Schatten | Zwei stockwerke eines gebaeudes verbindende, zusammenschiebbare treppe |
EP1035268A2 (fr) | 1999-03-11 | 2000-09-13 | Ming Dr. Gao | Escalier à moteur |
US6886661B1 (en) * | 2003-09-26 | 2005-05-03 | William D. Battenberg | Motorized access ladder for elevated areas |
WO2006122970A1 (fr) * | 2005-05-18 | 2006-11-23 | Michael Burke | Ensemble escalier de grenier escamotable |
US20090166129A1 (en) | 2007-12-26 | 2009-07-02 | Ernest Ray Siler | Power retractable stairway |
US20120199417A1 (en) * | 2011-02-04 | 2012-08-09 | Precision Ladders, Llc | Remote Controlled Overhead Ladder System |
Also Published As
Publication number | Publication date |
---|---|
EP2871300B1 (fr) | 2019-06-12 |
US9447637B2 (en) | 2016-09-20 |
US20150122580A1 (en) | 2015-05-07 |
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